Vestibule-diaphragm.



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VESTIBULE DIAPHRAGM.

APPLICATION man SEPT. 24. 1915.

1,189,460. l PatentedJn15f4,1916.

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JOHN B. LYNCH, OF COOK COUNTY, ILLINOIS, ASSIGNOR TO Q & C COMPANY, OF NEVT` YORK, N. Y., A CORPORATION OF MAINE. e

VESTIBULE-DIAPHRAGM.

lSpecification of Letters Patent.

Patented Jury a, 191e.

Application led September 24, 1915. Serial No. 52,349.

T @ZZ 'whom it may cof/"wem Be it known that I, JOHN B. LYNCH, a citizen of the United States, residing in the county of Cook, State of Illinois, have invented a certain new and useful Improvement in Vestibule-Diaphragms, and declare the following to be a full, clear, and exact simple, effective `manner and with a minimum of waste. Y

A further object of my invention is to produce a vestibule diaphragm in which the number of parts shall be reduced to a minimum.

The various features of noveltywhereby my invention is characterized will hereinafter be pointed' out with particularity in the claims; but, for a full understanding of my invention and of its objects and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure l is a front elevation ofthe upper portion of a diaphragm arranged in accordance with my invention; Fig. 2 is a perspective view of one of the upper corners of the diaphragm looking from the inside; Fig. 3 is a developed view of one of the top sections; Fig. 4 is a developed view of one of the leg sections; Fig. 5 is a section on an enlarged scale on line 5-5 of Fig. l; and Fig. 6 is a section on an enlarged scale on line 6-6 of Fig. 1.

Referring rst to Figs. 3 and 4, l represents a strip of fabric or other flexible material of which a top section of the diaphragm is to be made and 2 represents a similar strip of which one of the corresponding leg sections is to be made. The dotted line, 3, in the strip 1 and the dotted line, 4, in the strip 2 represent the longitudinal medial lines along which the strips are bent or folded to give them the usual troughlike shape. In accordance with my invention I make the original length of the strip l equal to the overall width of the diaphragm and also make the original length of the strip 2 equal to the overall height of the diaphragm instead of cutting these members so as to have lengths equal, respectively, to the straight portion of the top, (assuming that the diaphragm is one with a straight 13015,) and the straight portion of the legs. The upper outer corners of the strips are cut away along curved lines corresponding to the curvature which the outer edge of the corner of the diaphragm is to have. A section is then cut out of the opposite long edge which forms what may be termed theV extension of each of these strips a curved tongue lindicated at 5 and 6, respectively, having a radial width equal to one-half the width of the corresponding strip plus a narrow added portion along the inner edge which provides an overlap for fastening the two curved tongues together as willhereinafter be described. The inner ends of the tououes and 6 terminate at such a point as to leave the short halves of the members l and 2 slightly longer than the straight .portions of the topV and leg members of the diaphragm, thus providing overlapping portions which will permit lap seams to be made between the end of the tongue of one section and the short portion of the other section. The dotted lines 7 and 8 represent, respectively, the ends ofthe straight portions of the top and leg sections while the curved dotted lines 9 and 10V are continuations of the lines 3 and 47 respectively, and indicate the bottoms of the trough-like corner members in the completed diaphragm. The material extending outwardly from the lines 7 and 9 and the lines 8 and 10 form the flaps or overlapping portion by means oi' which the joints are produced.

With two blanks located relative to each other as are the blanks in Figs. 3 and 4, respectively, if the straight part of blank l below the medial line is bent backwardly, the straight part of the blank 2 to the left of the medial line is bent backwardly and the two blanks are then superposed upon each other so as to cause the tongue 5 to overlie the tongue 6, it will be seen that the iap beyond the dotted line 7 overlapsthe adjacent end of the tongue 6 and may be sewed thereto. In the same way the Inaterial beyond the dotted line 8 overlaps the tongue 5 and may be sewed or otherwise fastened thereto. Similarly the material of the. tongues 5 and 6 beyond lines 9 and l0 may be bent inwardly along these lines and form a double overlap which will permit two seams to be made. In the arrangement illustrated, this double" joint is made by means oit' stitches, 11, and reinforcing rivets, l2. It will thus be seen that when the top and leg sections are fastened together they produce a continuous smooth trough in which the top and leg portions are at an angle to each other, this angle being determined by the angular length of the tongues 5 and 6 which, in the present instance, is illustrated as being ninety degrees, so that the top and leg members lie at right angles to each other.

The diaphragm as a whole is formed by lacing a plurality of the trough-like members side by side and securing them together in any suitable way along the outermost edges. In the arrangement shown, the joints between adjacent top sections are reinforced by metal stiffening pieces, 14, inserted between the engaging edges as best shown in Fig. 6; the joints being made by stitching through U-shaped binding strips, 15, emracing the edges of the diaphragm memers.

While I have illustrated and described with particularity only a single preferred form of my invention, I do not desire to be limited to the eXact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the terms employed in the denitions of my invention constituting the appended claims.

I claim:

l. Two trough-like members lying at an angle to each other, one of each of said members being extended and shaped to meet the corresponding side of the other member to form a trough-like corner connecting said members.

2. Two trough-like members lying atan angle to each other with their corresponding longitudinal elements in the same planes, one side of each of said members being extended in the form of an arc of a ring of an angular length equal to the angle between said members and meeting the corresponding side of the other member to form a trough-like corner connecting said members.

3. In a diaphragm, trough-like leg, top and corner sections; one side of the corner section being a continuation of the corresponding side of the leg section; and the other side of the corner section being a continuation of the corresponding side of the top section.

4. In a diaphragm, trough-like leg, top and corner sections; one side of the corner section being a continuation of the correspending side of the leg section and lying at an angle to and in the same plane as the latter side; and the other'side of the corner section beinga continuation of the corresponding side of the top section and lying at an angle to and in the same plane as the latter side.

5. In a diaphragm, a trough-like leg section, top section and corner section made out of two pieces of material; one of the pieces constituting the leg section and one side of the corner section; and the other piece forming the top section and the other side of the corner section.

6. A blank for a device of the character described, comprising a strip having at one end a diagonally arranged tongue of a width approximately equal to one-half the Width of the strip, the tongue projecting from one side edge of the strip toward the opposite side edge.

In testimony whereof I sign this specification.

JOHN B. LYNCH.

Copies of this patent may be obtained for ve cents each, 'by-addressing the Commissioner of Patents.

Washington, D. C. 

